The BBC's Faisal Islam was in the room when President Trump told his audience that he would not use force in Greenland, but also launched a long argument for why the US should own it.
Istanbul, Turkey is a city rich in history and culture, but among the bustling streets and historic landmarks, there are also hidden gems waiting to be explored - abandoned places. These forgotten relics offer a glimpse into the past, allowing visitors to step back in time and imagine what life was like in days gone by.